cpu_t Struct Reference

#include <smp.h>

Collaboration diagram for cpu_t:

Public Attributes
struct cpu_t *	self
uint32_t	cpu_id
uint32_t	lapic_id
struct thread *	idle_thread
uint8_t *	kstack_base
struct thread *	run_queue_head
struct thread *	run_queue_tail
uint32_t	queue_depth
struct thread *	current_thread
uint64_t	kstack_top
uint64_t	user_rsp_scratch

Detailed Description

cpu_t - Per-CPU state block; GS.base on each CPU points to this struct.

The first field MUST be a self-pointer at offset 0 (gs:0) so cpu_local() works with a single mov %gs:0, %0 instruction regardless of cpu count. Fields at fixed GS offsets are used by assembly: current_thread at gs:56, kstack_top at gs:64, user_rsp_scratch at gs:72.

Member Data Documentation

cpu_id

uint32_t cpu_t::cpu_id

current_thread

struct thread* cpu_t::current_thread

idle_thread

struct thread* cpu_t::idle_thread

kstack_base

uint8_t* cpu_t::kstack_base

kstack_top

uint64_t cpu_t::kstack_top

lapic_id

uint32_t cpu_t::lapic_id

queue_depth

uint32_t cpu_t::queue_depth

run_queue_head

struct thread* cpu_t::run_queue_head

run_queue_tail

struct thread* cpu_t::run_queue_tail

self

struct cpu_t* cpu_t::self

user_rsp_scratch

uint64_t cpu_t::user_rsp_scratch

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The documentation for this struct was generated from the following file:

• include/miniOS/arch/x86_64/smp.h